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可溶性纖溶酶原激活物受體在社區(qū)獲得性肺炎中的表達(dá)及臨床意義
【摘要】 目的:探討可溶性尿激酶型纖溶酶原激活物受體(suPAR)在成人社區(qū)獲得性肺炎(CAP)住院患者中的表達(dá)及臨床意義。方法:采用用酶聯(lián)免疫吸附試驗(yàn)(ELISA)法測(cè)定61例住院CAP患者治療前后及60例健康對(duì)照者的血漿suPAR水平,測(cè)定所有研究對(duì)象的CRP、WBC及PCT水平,CAP患者入院時(shí)進(jìn)行肺炎CURB-65及APACHEⅡ評(píng)分,分析血漿suPAR與PCT、CRP、CURB-65、APACHEⅡ及住院時(shí)間的相關(guān)性。結(jié)果:肺炎治療前suPAR、CRP、WBC及PCT水平均顯著高于對(duì)照組,肺炎治療后suPAR、CRP、WBC及PCT水平較治療前顯著降低,以上各項(xiàng)比較差異均有統(tǒng)計(jì)學(xué)意義(P
【關(guān)鍵詞】 可溶性纖溶酶原激活物受體; 社區(qū)獲得性肺炎; CURB-65評(píng)分; APACHEⅡ評(píng)分
Expression and Clinical Significance of suPAR in Patients with Community-Acquired Pneumonia/SUN Xun,ZHU Xue-chuang,HAO Yu-gui,et al.//Medical Innovation of China,2015,12(23):039-042
【Abstract】 Objective:To investigate the expression and clinical significance of soluble urokinase-type plasminogen activator receptor (suPAR) in patients with CAP. Method:The plasma suPAR levels of 61 adult patients with CAP and 60 healthy patients were measured by the method of enzyme-linked immunosorbent assay(ELISA).The levels of CRP、WBC and PCT of all research objects were measured.The APACHE Ⅱ and CURB-65 scores were evaluated when the patients were hospitalized.The relationship between plasma suPAR and PCT,CRP,CURB-65 score,APACHEⅡ score,length of stay were analyzed. Result:Before treatment,the suPAR,CRP、WBC and PCT levels in patients with CAP were significantly higher than those in the control group,after treatment,the suPAR,CRP、WBC and PCT levels of CAP patients were lower than before treatment,the differences above were all statistically significant(P 【Key words】 Soluble urokinase-type plasminogen activator receptor; Community-acquired pneumonia; CURB-65 score; APACHE Ⅱ score
First-author’s address:Zaozhuang Municipal Hospital,Zaozhuang 277100,China
社區(qū)獲得性肺炎是最常見(jiàn)的感染性疾病,有很高的發(fā)病率和死亡率。在美國(guó)肺炎與流感是第九位的常見(jiàn)死亡原因,2010年約5萬(wàn)人死于肺炎[1]。及時(shí)、有效的抗生素治療能降低發(fā)病率和死亡率,早期的診斷和病情嚴(yán)重程度的評(píng)估對(duì)CAP患者的治療顯得尤為重要。suPAR是尿激酶型纖溶酶原激活物受體(uPAR)的可溶形式,在某些感染性疾。ㄈ缇Y、HIV感染)、腫瘤及一些慢性疾病(如腎病、肝病)中,血漿suPAR水平升高。近年研究發(fā)現(xiàn),血漿suPAR水平的升高與疾病預(yù)后不良相關(guān)。本研究通過(guò)分析CAP患者血suPAR水平與其他炎癥標(biāo)記物及病情嚴(yán)重程度指標(biāo)的相關(guān)性,評(píng)估suPAR對(duì)CAP患者危險(xiǎn)分層和預(yù)后的價(jià)值。 目前關(guān)于suPAR的研究集中于系統(tǒng)性炎癥反應(yīng)綜合征(SIRS)、膿毒血癥等[9-10],且顯示了作為新型炎癥標(biāo)記物的價(jià)值,而國(guó)內(nèi)外未見(jiàn)在成人CAP中的研究報(bào)道。有在兒童CAP的研究顯示,其血漿suPAR濃度明顯高于健康個(gè)體,且與C-反應(yīng)蛋白、住院時(shí)間呈正相關(guān),重癥患兒血漿suPAR水平明顯高于非重癥患兒[11]。Wrotek等[12]對(duì)兒童CAP的研究亦顯示血漿suPAR水平與C-反應(yīng)蛋白、PCT等呈正相關(guān)。這與本研究在成人CAP的研究一致。
本研究顯示肺炎患者血漿suPAR增高,可能由于肺炎患者uPAR在白細(xì)胞中表達(dá)增高。而uPAR表達(dá)增加,進(jìn)一步促進(jìn)炎癥細(xì)胞的趨化及滲出,有利于感染的清除。目前已有一些基礎(chǔ)實(shí)驗(yàn)間接證明了這一點(diǎn)。在銅綠假單胞菌肺炎動(dòng)物模型中,uPAR基因敲除小鼠與野生小鼠相比,中性粒細(xì)胞的募集能力明顯下降,且uPAR基因敲除的小鼠,肺部中性粒細(xì)胞遷移減少[13-14]。Gyetko等[15]的研究表明細(xì)胞膜表面的uPAR可調(diào)節(jié)抗原致敏引起的淋巴細(xì)胞向肺部的募集。uPAR在白細(xì)胞中表達(dá)增高,uPAR從細(xì)胞表面脫落進(jìn)入血液導(dǎo)致suPAR的增高。
總之,本研究發(fā)現(xiàn)血漿suPAR水平能夠評(píng)估成人CAP的病情嚴(yán)重性,指導(dǎo)抗生素治療。盡管本研究存在樣本量小、未進(jìn)行細(xì)菌學(xué)分析、未進(jìn)行靈敏度及特異度分析的缺點(diǎn),但本研究提示了suPAR可以作為CAP的炎性標(biāo)記物,與其他標(biāo)記物一起評(píng)估病情,指導(dǎo)診療。在成人CAP中,suPAR的價(jià)值今后尚需大規(guī)模前瞻性研究。
參考文獻(xiàn)
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(收稿日期:2015-01-22) (本文編輯:王利)
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